P3416 code definition
P3416 is the universal OBD-II code for Cylinder 2 Exhaust Valve Control Circuit High. Cylinder 2 simply indicates that the issue is probably taking place in engine cylinder number 2.
What the P3416 code means
Most newer vehicles with eight or more cylinders are equipped with a feature which allows half of the engine cylinders to shut down when they’re not needed – such as times of light load operating conditions. Various components – such as the mass airflow sensor (MAF) – send data to the ECM (engine control module) – informing it of the operating conditions so that it can signal cylinders to turn on and off depending upon when they are needed.
The data sent to the ECM from the various sensors is supposed to be within a certain range, measured as voltage. When this signal is out of the scope of what it should be, a fault code will set – in this case P3416 – alerting you to the fact that something is not right with the cylinder 2 exhaust valve.
What causes the P3416 code?
Automatic cylinder deactivation can have a number of potential causes, including:
- A bad MAP, MAF, or TP sensor
- A faulty valve lifter
- Oil passageway clogs caused by dirt and sludge buildup
- Corrosions, damage, or other issues that create a short in the wiring
- Fuel pressure outside of the normal range
While it is possible for the ECM to be at fault in a problem like this, that is almost never the case.
What are the symptoms of the P3416 code?
The Service Engine Soon lamp may illuminate, and the vehicle will not be able to switch over to the lower power mode, such as V4. There could be vibrations while driving, and a potential loss of fuel efficiency over the long run.
How does a mechanic diagnose the P3416 code?
Steps a technician may take to diagnose this fault code include:
- Use an OBD-II scanner to record freeze frame data and clear the code of the vehicle’s computer, then test drive it again to see if the code comes back
- Check the oil pressure, level, and condition
- Use a scan tool to attempt manual activation and deactivation of the deactivation solenoid
- Test the sensors
- Inspect wiring and connectors for damage or corrosion
- Inspection of wiring and connections
- Inspect oil passageways for blockages from debris or sludge
- Inspect the valve lifters
Common mistakes when diagnosing the P3416 code
The most common error people make when diagnosing this code is to replace system components without first carrying out all recommended steps in the diagnostic protocol. Oil blockages in particular must not be overlooked – these can frequently cause oil pressure issues which may lead to this fault code setting.
How serious is the P3416 code?
While the vehicle will still run even with this code active, if the problem isn’t addressed in a timely manner the engine could be put under excess strain, and fuel efficiency will suffer. The best thing is to have a qualified professional assess the situation as soon as you can get your vehicle into the shop.
What repairs can fix the P3416 code?
Possible repairs for a cylinder 2 deactivation malfunction may include:
- Cleaning of blockages in the oil passageways
- Replacing the MAP, MAF, and/or TP sensors
- Repairing or replacing damaged wiring or connectors
- Replacing the deactivation solenoid
- Replacing the valve lifter
Additional comments for consideration regarding the P3416 code
A cylinder 2 deactivation or exhaust valve problem could involve a number of complex possible solutions. A qualified automotive technician has the appropriate tools to quickly and efficiently diagnose and repair the source of the problem. Pinpointing an issue with an engine cylinder can take the home mechanic a considerable amount of time and expense. If your vehicle is setting the P3416 code, it may be best to have it assessed by a professional technician.
Need help with a P3416 code?
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